I’ve just released version 0.9 of Footnotes for WordPress which is a WordPress plugin to ease the writing and cross-referencing of footnotes.
This is the first release and there might be bugs to be ironed out, so use at your own risk! The plugin has been tested and found to be working on at least a couple of installations of WordPress versions 2.0.9 and 2.1.1.
I was hoping to have the tags provided by the plugin to be added to the quicktags in this release, but my lame php and plugin-writing skills got the best of me.